A student's question

My teacher keeps drilling into our collective heads that using the break command is harmful, and that if we wish to terminate a loop early it would be far better to create a boolean variable, set it to 0, and add a condition to the head of the loop, and set the boolean variable to 1 when a break is needed. Note that this way you actually have to check this every single loop (where it is not needed almost every time) as well as waste a command to reset the boolean in case it was set to true.

Is there a reason to this?

>>88
syntax-case is r6rs standard, (define-syntax (head . args) . body) is a widespread extension to define-syntax, (define-syntax-rule (f . pat) . body) is sugar for (define-syntax f (syntax-rules () (pat . body))), make-parameter and parameterize are R6RS, R7RS and SRFI-I-don't-remember, object-name is non-standard.